BQ2019PW Datasheet, PDF (22/27 Pages) Texas Instruments – ADVANCED BATTERY MONITORIC

bq2019
ADVANCED BATTERY MONITOR IC
SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003
Accessing page 1 or
page 2
Did you read data 0xFF
from a location on page 1
or page 2?
No
Proceed. No action
required.
Yes
Is there an address in the
same page with known data
other than 0xFF?
Yes
No
Did you read data 0xFF
from this address?
0xFF data from
No
first read is valid.
Yes
Write data 0xDF to
address 0x70
(FPA=0xDF)
Read verify address
0x70
Write data 0xFF to
address 0x6F
(FPD=0xFF)
Read verify address
0x6F
Write data 0x0F to
address 0x62
(FCMD=0x0F)
Read desired address in page 1 or
page 2. Data is valid.
Figure 2. Procedure Flow for Safeguarding Method Number Two
22
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